Why Is Square Root of 25 Not Plus or Minus 5?.

Roach, David; Gibson, David; Weber, Keith

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Peer reviewed

ERIC Number: EJ717671

Record Type: Journal

Publication Date: 2004-Jan-1

Pages: 5

Abstractor: Author

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ISSN: ISSN-0025-5769

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Why Is Square Root of 25 Not Plus or Minus 5?

Roach, David; Gibson, David; Weber, Keith

Mathematics Teacher, v97 n1 p12 Jan 2004

Students learn more when they attempt to make sense of a mathematical situation they face. For example, a question like why square root of 25 is not + or - 5. Providing the intermediate steps and the reasoning of a technique with graphs can help make better sense of mathematics.

Descriptors: Mathematical Concepts, Mathematics Education, Transformations (Mathematics), Mathematics Instruction

National Council of Teachers of Mathematics, 1906 Association Drive, Reston, VA 20191-1502. Web site: http://www.nctm.org.

Publication Type: Journal Articles; Opinion Papers; Reports - Descriptive

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Audience: N/A

Language: English

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